javascript falsy values
the number 0
the BigInt 0n
the keyword null
the keyword undefined
the boolean false
the number NaN
the empty string "" (equivalent to '' or ``)javascript falsy values
the number 0
the BigInt 0n
the keyword null
the keyword undefined
the boolean false
the number NaN
the empty string "" (equivalent to '' or ``)falsy javascript
//The 6 Falsy values:
false
0
""//empty strings
undefined
null
NaNis null falsy javascript
/*
Yes.
Full list of falsy values:
Anything evaluated to be 0
'', "", or ``
null
undefined
NaN
Obviously false
Big integers relative to 0n
-------------------------------------------------------------------------
To clarify, line 31 will print false.
*/
var someCheckIsTrue = false;
const checks = [
0,
'',
"",
``,
null,
undefined,
NaN,
false,
0n
];
for (const check of checks) {
if (check) {
someCheckIsTrue = true;
}
}
console.log(someCheckIsTrue);javascript truthy
// Truthy values:
// All values are truthy, BUT (excluding) the following:
0
''
undefined
null
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